psql \dX: list extended statistics objects
The new command lists extended statistics objects, possibly with their
sizes. All past releases with extended statistics are supported.
Author: Tatsuro Yamada
Reviewed-by: Julien Rouhaud, Alvaro Herrera, Tomas Vondra
Discussion: https://postgr.es/m/
c027a541-5856-75a5-0868-
341301e1624b%40nttcom.co.jp_1